Journal-brass



(No Model.)

W. MOOOMBIB.

JOURNAL BRASS.

No. 433,301. Patented July 29, 1890.

UNITED STATES PATENT OFFICE.

XVILLIAM MOCOMBIE, OF CHICAGO, ILLINOIS.

JOURNAL-BRASS.

SPECIFICATION forming part of Letters Patent No. 433,301, dated July 29, 1890.

Application filed May 2, 1890. Serial No. 350,366. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM McCoMBIn, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in J ournal-Brasses, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain improvements in journal-brasses; and it has for its object to provide a journal-brass with an anttfriction bcarin having two distinct bearingsurfaces of dissimilar metals or alloys possessing different degrees of hardness, the softer metal or alloy projecting beyond the bearing surface of the harder metal or alloy to receive the first bearing of the journal, the two metals or alloys being of such nature that their contiguous surfaces will be intimately united, cemented, or welded in forming the lining, as more fully hereinafter specified.

I11 the accompanying drawings, forming part of this specification, Figure 1 represents a longitudinal, and Fig. 2 a sectional, view of a journal-brass, showing my improved bearings applied thereto. I

In the said drawings, the letter A indicates a shell of the usual construction, and B and C the bearing-blocks forming the lining thereof. The block 0 is preferably form ed of sheet-lead, and the block 13 of an anti-friction alloy, such as Babbitt metal or other similar compound.

In constructing thisbrass the shell is placed in the mold, as usual, and the sheet of lead 0, suitably curved and beveled at its edges, is located in the mold in proper position to leave a suitable space between its inner face and the inner face of the shell A to receive the filling of Babbitt metal or alloy B, which is fused and poured in in the usual manner. The inner face of the lead, or that face opposite the inner face of the shell, previous to be ing placed in position in the mold,is suitably prepared, so that when the alloy is poured in it will unite with or become cemented, soldered, or welded to the sheet of lead, so as to form virtually one block having bearing-surfaces of differentdegrees of hardness. The surface of the lead may be prepared to receive the alloy by coating it with a suitable flux, such as a mixture of resin and borax. The temperature of fusion of the soft and the harder block must be nearly the same, so that the harder metal will when poured in make only a surface fusion of the softer metal, in order to unite therewith, and not be suiliciently hot to fuse the entire body of the softer metal and destroy its form.

Any two dissimilar metals or alloys may be used for the lining; but, as before stated, I prefer to employ lead in conjunction with a suitable alloy of a melting temperature about that of lead. In practice I have found an alloy composed of the following ingredients, in about the proportions named, to answer well: copper, four pounds; tin, forty pounds; antimony, twenty-six pounds; lead, one hundred and thirty pounds. It is evident, however, that other metals may be employed to produce an alloy having the proper characteristics without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

A journal-bearing consisting of a suitable shell, a block composed of a suitable alloy, and a thin sheet of softer metal seated within said block and projecting beyond its bearingsurface, the block and alloy being cemented together at their contiguous surfaces, substantially as and for the purposes specified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM MCCOMBIE. \Vitnesses:

PETER F. BIESEN, JAMES MCCOMBIE. 

